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(No Model.) 1o sheets--sheet 1. G. E. WRIGHT & W. MONK. APPARATUS PDR'EXTRAGTING OIL.

No. 592,535. Patented Oct. 26,1897.

(No Model.) 1o sheets-#sheet 2. G. E. WRIGHT 8v W. MONK.

APPARATUS POR BXTRAGTING OIL.

No. 592,535. Patented Oct. 2.6, 1897.

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(No Model.) 10 Sheets-Sheet 3. G. E. WRIGHT 8v W. MONK.

APPARATUS POR EXTRAGTING OIL.

Patented Oct. 26, 1897.

Mum NOM/@mm (No Model.) 10 Sheets-Sheet 4.

G. E. WRIGHT & W. MONK.

APPARATUS Pon EXTRAGTING OIL.

No. 592,535. Patented Oct. 26,1897.

Ffa. 4.

(No Model.) 10 Sheets-Shet 5.

G. E. WRIGHT & W. MONK. APPARATUS FOR EXTRAGTING OIL.

No. 592,535. Patented Oct. Z6, 1897.

Ffa, 4.6L

(No Model.) 1o sheecssheet 6. G. E. WRIGHT 8v W. MONK.

APPARATUS FOR EXTRACTING UIL.

N0. 592,535.` Patented O0'.26,1897.

(No Model.) 10 Sheets-Sheet 7.

, G. E. WRIGHT & W. MONK. APPARATUS Fon EXTRAGTING oI-L.

No. 592,535. Patented 001;. 26, 1897.

Ffa. 6.

(No Model.) 10 Sheets-Sheet. 8.

G. E. WRIGHT 8v W. MONK. APPARATUS FOR BXTRAGTING OIL.

No. 592,535. Patented Oct. 26, 1897.

(No Model.) 10 Sheets-Sheet 9. G. E. WRIGHT 8u W. MONK.

APPARATUS POR EXTRAGTING OIL.

No. 592,535. Patented Oct. 26,1897.

(No Model.) 1o sheets-'sheet 1o. f

G. E. WRIGHT 8v W. MONK.

APPARATUS PoR PXTPAGTING OIL.

No. 592,535. Patented 055. 25,1897.

= 5F I i- E '75a 55 MM M @Q @idf NiTnn STATES PATENT @Trina iEORGE EDWARD IVRIGHT AND WILLIAM MONK, OF NOTTINGHAM, ENGLAND. u

APPARATUS FOR EXTRACTING Oll...

SPECIFICATION forming part of Letters Patent No. 592,535, dated October 26, 1897. Application filed July 28, 1896. Serial No. 600,805( (No model.) Patented in England May 19, 1896, No. 10,752.

Tc @ZZ whom, it 7am/y concern,.- y

Be it known that we, GEORGE EDWARD WRIGHT, of Vollaton, Nottingham, and NVILLTAM MQNK, of Nottingham, in the county of Nottingham, England, have invented certain new and useful Improvements in Machines for Degreasing Leather, (for which we have obtained Letters Patent in` Great Britain, No. 10,752, bearing date May 19, 1896,) of which the following is a specification.

The invention resides in the features of construction and arrangement hereinafter described, and specifically pointed out in the claims.

XVe carry our improvements into practical effect by means of a machine or apparatus constructed substantially as hereinafter described with reference to the accompanying ten sheets of drawings, forming part of this specification. Y

Figures l and 2 are elevations of the machine. Fig. 3 is a plan of the lower part, and Fig. 4 is a plan of the upper part, of the machine; and Fig. l is a detail of part of the saine. Figs. 5 to l0 are detail views of various parts of the machine.

In the construction illustrated the machine is furnished with two tanks A A for the reception of the skins or leather goods to be degreased, so that while the degreased skins in one tank are being dried another series of skins are being degreased in the other tank.

Each of the tanks A A' is fitted with asuitable lid B, (shown in the detail views Figs. 5 and (3,) which is capable of being raised and lowered by any convenient arrangement of gearing. For example, as illustrated in Figs. l and 2, a shaft C is supported in bearings carried by two girders C above the lid B and two chains C2, secured at one end, respectively, to the girders. Each chain C2 passes under a grooved pulley C3, mounted on the lid over a chain-wheel C4, fixed on the shaft C', and around a chain-wheel C5 to a balanceweight CG. Also, fixed on the shaft C is a spur-wheel C?, which gears with a pinion C8, upon the axis of which is fixed a sprocketwheel C9, actuated by a hand-chain C1".

The skins A4 A5 A, Fig. 2, to be treated are suspended by means of springeclips or other suitable fasteners from a series of gratings E, which run on angle-iron or othersuit able frames A2, connected by links E/ to the underside of the lid B, rollers E2 being mounted on the gratings E to diminish friction and facilitate the handling of the gratings with the skins.

Any suitable arrangement'of mechanism may be employed to impart a reciprocating movement to the frames A2 and gratings, so as to move the skins to and fro while immersed in the solvent. NVe show for this pur pose a crank E3 on a vertical shaft E4, which passes through a stuffing-box in the lid B and is supported by standards B on the under side and standards B2 on the top side of the lid. On each shaft E4 is a bevel-wheel E5, gearing with a bevel-wheel E6 on a horizontal shaft E7, supported in brackets sel cured to the lid. Also, mounted on the shaft E7 are fast and loose pulleys E8, which are driven by a belt, (not shown,) and so drive the vertical shafts E4 and cranks T3, which, by connecting-rods E9, impart a reciprocating motion to the cross-stays of the frames A2, and so to the series of gratings E, this motion assisting and accelerating the process of ein tracting the grease from the skins suspended from the gratings and immersed in the solvent.

The tanks A A have suitable pipes con trolled by valves D D' for regulating the ingress and D2, D3, D4, and D5 the egress of the liquid volatile solvent used in degreasing the leather placed in the tanks.

The tanks A A are charged with the liquid volatile solvent from a charging-tank F, to which they are connected by means of pipes DSD?, controlled by valves D D', respectively. (See Figs. 2 and 3.) The charging-tank is supplied with clean solvent from two reserves tanks G G', which are connected together by a pipe G2 and by a pipe (not shown) at a lower level, so that the solvent in each tank may be at the same height. The charging-tank F is also connected to the tanks G G by a pipe G3, controlled by a valve G4, actuated by a handwheel G5, Figs. l and 4, and by a pipe II to the delivery side of a pump H. The pump H is also connected on the suction or inlet side IOO by pipes H3 H4 and valves D2 D3, respectively, to stand-pipes H7, (see Fig. 4 in plan and Fig. 4: 1n elevation,) placed one 'in each tank A A', and by which means two-thirds or'other desired proportion of the liquid volatile solvent fromeither tank can be pumped back into the charging-tank F. Y

The valve D2, actuated by a hand-Whee1I-I3, Figs. 4 and 1, is to break connection between the pump H and the tanks A A' While the pump H is taking from G a quantity of clean solvent to make up the charge in the tank F equal to that run off -by the valve D4 into the evaporating-pan L for recovery,as hereinafter described.

The pump H is driven by means of a belt and pulleys I, Fig. 3, anda crank-pin on Ia disk I', coupled by a connecting-rod I2 to the piston of the pump H, 'or lby l'any lother convenient arrangement of drivin g-gear.

Inside the tank F We place an arrangement offstear'nlpipe's J orfany other suitable means for heating acharge of liquid 'solvent prior to running it off by the pipe D6 or D7 and 'valve D or D' into the tank A or A', as the case maybe.

The tanks A A are connected by pipes L', contrai-'ed tty "valves D4 D5, respectively actuated b'yhand-'Wheels D3 and D2, Figs.g2 and 4, to the "s'teainLjacke-ted pan L, which is yprefv` e'r'ably ii'tte'd'v'vi'th a steam-coil and into which the spentV "Slventwhen saturated with grease is r'u'n fiomei'ther'tank tobe evaporated. f The velvapora-ti'n" r,Q--} an L is connected by pipes M' M2 to two 'condensers M3 M4, respectively, by which the volatile solvent vevaporated -in the pain 'L is condensed and recovered and re- I turn 'd through pipes M5 M6 to 'the pipe G2 and reservelta'nksG G'. A fangW isconnectedon the fljottoin side 1of the conde'nsers -M3Jand M4 by pipes W' vand W2 vand vdraws :air from the pan L to 'thef'condensers and discharges it by a pipe W3 into the pan L again, 'thereby 'assisting vapor to pass through M3 and M4. The grease separated from the spent solvent in the evaporating-pan L is run off "through acock L4. (Shown in lin elevation and Fig. 3in plan.)

`Iji1 addition to the condensers M3 M4, which recover 'the solvent evaporated in the pan L, We also employ 'a separate condenser N for recovering 'the solvent absorbed `by the hot air circulated through the saturated goods durifhfg'thedrying process after Athe 'solvent hasbeen runiout of the vtank A or A'. This condenser N is connected by pipes N' N2 N 3 and valves N4 N 5, actuated by chain and Wheels 'N3 and N7, with the tanks A A' and ou the bottom 'side by a pipe Nwith a `fan`O and heater P, which is connected by -pipes O' and 02 and valves 'O3 and the rectangular vbranch Qto'the tanks A and A'and by a pipe O4 and valve O5 to the charging-tank F. The fan O isdriven by a belt and pulley, asshow'n, or inany other convenient manner, andthe hotairfcirculated by it passes into one end of the :tank A or A', as the case'1nay-be,'abov`e the suspended skins and, following the course indicated by the arrows in Fig. 6, passes downward at the other end through a perforated Zinc or other suitable baffle-plate A3, which distributes the hot air evenly among the goods which are suspended at an equal and known distance from each other, this arrangement preventing any skin comin g in contact with another, which was a defect in previous methods of hanging goods on skewers. The hot air passes out by valves N4 and N5 and by pipes N2, N3, and N' into the condenser N, where the solvent absorbed by the hotair in its passage through the saturated goods is recovered and drained off into the reserve-tank G or G', the air being drawn again through the heater P by the fan O and passing thence into the tanks A A' through the goods, as before described.

To keep the con'densers M3, M4, and N cool, a pump Q, (shown in Fig. 1,) driven by a belt and pair of pulleys Q' or otherwise, as convenient, is employed to circulate cold Water through the condense-rs, the water being supplied to the condenser N by a pipe Q2 and passingr thence by pipes Q3 Q4 -into the condensers M3 M4, from which it is discharged through pipes Q5 Q6, respectively.

To `'agitate and maintain the temperature of, the liquid volatile solvent'in which the skins are immersed during the degreasing process, we employ perforated pipes R inside each tank A A'-, through which pipes Vair under pressure is forced by van air-pump S through a heater T. The air is drawn from the top ofthe tank A or `A above the level of the liquid solvent therein through a pipe S', controlled by valves S2, into the air-pu mp S,

whence it is forced through a pipe S3 into the heater T,"and then raised to the desired temperature. vPassi-ngthrough a valve S4, Fig. 4, it is forced through the perforated pipes R into the tank A or A', thus completing the circuit. v p

Having specified the several parts of the machine, we will now proceed to describe how we carry out the operation of degreasing leather `therein.

We first release the fastenings B3, Figs. 6 and 8, by which the 4lid B is made air-tight and retained in position on its tank A or A'. For convenience of description We Will suppose that the operation is in this case to be carried out in the tank A. XVe then by means of 'the hand-chain@10 and gearing 2described raise the ylid B clear of the tank A and'dravv the gratings E on their rollers E2 out of the frames A2 and take off the goods, which wewill suppose have already been degreased. These gratings are then put aside to be refilled with skins during the time that the goods are drying in the other tank A', and We take a third set of gratin-gs E, which have been filled with skins while the goods were drying in the tank A, and slide them into their places on the frames A2. This having been done, the lid is loweredandsecured by the fasteners B3, and the following valves are IIO closed: the valve D4, to shutoff communication with the evaporating-pan L the valve O3, to shut off the hot air from the fan O and heater P, and the valves N4 N5, shutting off the condenser N from the tank A. Then the valve D is opened to allow the charge of warm liquid volatile solvent in the chargingtank F to flow into the tank A, and the valve O5 is opened to allow the air displaced by the solvent to pass from the tank A through the pipe O'1 into the tank F. lVhen the charge .of solvent has entered the tank A, the valve D is closed, the valves S2 and S4 are opened, the airpump S is set in motion, thereby circulating warm air through the perforated pipes R, as before described, and the belt is put on the fast pulley ES, so as to drive the shaft E7 and agitate the frames A2 with the gratings E and the skins immersed iu the solvent. This process is continued, say, for an hour or more, or less, as required, until the skins are completely degreased. Then the belt is shifted from the fast to the loose pulley E8 to stop the rotation of the shaft E7 and the oscillation of the frames A2 and gratings E, and the pump S is also stopped to interrupt the air circulation through the perforated pipes R.

On completion of the degreasing process and after an interval of at least ten minutes to allow time for the grease and solid matters to settle somewhat in the tank A the valve D2, actuated by the hand-wheel H8, is opened and the pump II started and two-thirds of the liquid solvent in the tank A pumped back to the charging-tank F until the solvent is reduced to the level of the top of the standpipe Il?. Then the valve D2 is closed and the valve D'1 is opened, and the one-third charge of solvent remaining in the tank A is run off into the evaporating-pan L. The valve D4 is then closed, and the solvent is then evaporated in the pan L, the grease and solids separated and collected, the vapor condensed in the condensers ills M4, and the recovered liquid solvent thus purified is run off through the pipe G2 into the reserve-tank G or G'. While the separation of the grease and the purification and recovery of the liquid volatile solvent is taking place the valves N'l and N5 are opened and the fan O set in motion, and air heated by the heater P is circulated through the tank A, iiowing evenly and softly between and about the suspended skins and gradually absorbing the liquid volatile solvent with which they are saturated. As the saturated air passes through the condenser N the vapor is condensed into liquid and the volatile solvent recovered in that form, the purified air passing forward to the tank A after being reheated in the heater P. This air circulation and drying process is continued for, say, an hour or an hour and a half, until the skins are quite dry and all the. solvent has been recovered. The valves N4 N5 are then closed, the lid B is released, and the gratings Il, with the degreased skins, are then removed from the tank A and a fresh set substituted in the manner described.

Te wish it to be clearly understood that we do not limit ourselves to the several details nor to the particular construction orar- 'rangement of the parts herein shown and described, as the same may be considerably varied and modified without departing from the essential features of our invention hereinbefore specified and as hereinafter pointed out in the claims. For example, we might employ a single tank and appurtenances, but we prefer to duplicate the tanks and connections, so that while the degreased skins in the tank A are being dried another series of skins may be degreased in the tank A', and vice versa. Again, we might employ one supply-tank instead of the two tanks G G', and instead of the pumps, fans, and condensers employed We might employ any suitable equivalents.

Having now particularlydescribed and ascertained the nature of our said invention and in what manner the same is to be performed, we declare that whatwe claim, and desire to secu re by Letters Patent of the United States, is-

l. In combination with a degreasing-tank, an evaporator, an air-circulating system connected therewith including a condenser, a second air-circulating system connected to the tank independently of the evaporator, said second system including a condenser, and a valve for cutting off the evaporator with its air-circulating system from the tank, substantially as described.

2. In combination, the degreasing-tank having a stand-pi pe H therein, the removable cover adapted to carry the skins, a chargingtank connected with the stand-pipe, an evaporator connected with the degreasing-tank and a condenser with independent air-eirculating systems for the evaporator and the degreasing-tank, substantially as described.

3. The combination with a tank such asA or A', of a movable lid fitted with sliding frames carrying the gratings or equivalents from which the skins are suspended at equal distances apart and means for moving said frames during the degreasing process said covers with the sliding frames being movable vertically to and from the tanks substantially as herein set forth.

4. In a degreasing apparatus, the combination of a degreasing-tank with inlet and outlet pipes for the liquid solvents, both of said pipes entering the tank at or near the bottom and the removable cover carrying the skins, substantially as described.

5. The combination with a tank such asA or A', of means for withdrawing air from above the level of the liquid volatile solvent in the tank and then heating and forcing the air again into the tank through perforated pipes or equivalents in order to agitate and aerate the solvent and facilitate the degreasing process substantially as herein .set forth.

G. In combination, the tank, a cover, a baf- IOO IIO

fle-plate A3 at one end thereof and an air-circulating system having both its inlet and outlet pipe connected to the tank at 'the end opposite the baille-plate whereby the entering 5 air Will pass along the top of the tank and return between the skins suspended therein to the outlet at the sanne end as the inlet, substantially as described.

7. In combinatioma degreasing-tank havro ing a baffle-plate and an air-circulating system having both its inlet and outlet ends at the same end of the tank and directed across the same to the opposite end, substantially as described.

In Witness whereof We have hereunto set I5 our hands in presence of two Witnesses'.

GEORGE EDWARD WRIGHT. WILLIAM MONK.

Witnesses:

THos. H. CooK, DOUGLAS E. STORER. 

